:root {
    --md-sys-color-primary: #7C4DFF;
    --md-sys-color-secondary: #00B0FF;
    --md-sys-color-on-primary: #FFFFFF;
    --md-sys-color-primary-container: #E8DEFF;
    --md-sys-color-on-primary-container: #2A0060;
    --md-sys-color-on-secondary-container: #001A5C;
    --md-sys-color-surface: #FFFBFE;
    --md-sys-color-on-surface: #1C1B1F;
    --md-sys-color-surface-variant: #E7E0EC;
    --md-sys-color-on-surface-variant: #49454F;
    --md-sys-color-outline: #79747E;
    --md-sys-color-shadow: #000000;
    --md-sys-color-background: #F8F5FF;
    --md-sys-color-on-background: #1C1B1F;
    
    --md-elevation-1: 0 1px 3px 1px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.12);
    --md-elevation-2: 0 2px 6px 2px rgba(0,0,0,0.10), 0 1px 2px rgba(0,0,0,0.15);
    --md-elevation-3: 0 4px 8px 3px rgba(0,0,0,0.12), 0 1px 3px rgba(0,0,0,0.18);
    --md-elevation-4: 0 6px 10px 4px rgba(0,0,0,0.15), 0 2px 3px rgba(0,0,0,0.20);
    
    --md-motion-duration-short: 200ms;
    --md-motion-duration-medium: 400ms;
    --md-motion-duration-long: 500ms;
    --md-motion-easing-standard: cubic-bezier(0.2, 0.0, 0, 1.0);
    --md-motion-easing-emphasized: cubic-bezier(0.3, 0.0, 0.8, 0.15);
    
    --md-shape-corner-extra-small: 4px;
    --md-shape-corner-small: 8px;
    --md-shape-corner-medium: 12px;
    --md-shape-corner-large: 16px;
    --md-shape-corner-extra-large: 28px;
    --md-shape-corner-full: 999px;
    
    /* Glassmorphism variables */
    --glass-bg-light: rgba(255, 255, 255, 0.15);
    --glass-border-light: rgba(255, 255, 255, 0.25);
    --glass-shadow-light: 0 8px 32px rgba(0, 0, 0, 0.1);
    
    --glass-bg-dark: rgba(30, 30, 46, 0.2);
    --glass-border-dark: rgba(255, 255, 255, 0.1);
    --glass-shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.dark-theme {
    --md-sys-color-primary: #B39DFF;
    --md-sys-color-secondary: #80D8FF;
    --md-sys-color-on-primary: #2A0060;
    --md-sys-color-on-primary-container: #E8DEFF;
    --md-sys-color-on-secondary-container: #DEE3FF;
    --md-sys-color-surface: #1C1B1F;
    --md-sys-color-on-surface: #E6E1E5;
    --md-sys-color-surface-variant: #49454F;
    --md-sys-color-on-surface-variant: #CAC4D0;
    --md-sys-color-outline: #938F99;
    --md-sys-color-shadow: #000000;
    --md-sys-color-background: #141218;
    --md-sys-color-on-background: #E6E1E5;
    
    /* Dark theme glassmorphism */
    --glass-bg: var(--glass-bg-dark);
    --glass-border: var(--glass-border-dark);
    --glass-shadow: var(--glass-shadow-dark);
}

:root {
    --glass-bg: var(--glass-bg-light);
    --glass-border: var(--glass-border-light);
    --glass-shadow: var(--glass-shadow-light);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--md-sys-color-background);
    color: var(--md-sys-color-on-background);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--md-motion-duration-medium) var(--md-motion-easing-standard);
    padding-bottom: 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(var(--md-sys-color-surface-rgb), 0.85);
    backdrop-filter: blur(20px);
    padding: 20px 0;
    box-shadow: var(--md-elevation-1);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

header.scrolled {
    padding: 12px 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
    text-decoration: none;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.logo-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--md-shape-corner-medium);
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    color: var(--md-sys-color-on-primary);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(var(--md-sys-color-primary-rgb), 0.3);
}

header.scrolled .logo-icon {
    width: 40px;
    height: 40px;
}

.material-symbols-outlined {
    font-variation-settings:
        'FILL' 1,
        'wght' 400,
        'GRAD' 200,
        'opsz' 24;
    font-size: 30px;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
    color: var(--md-sys-color-on-primary);
}

.dark-theme .material-symbols-outlined {
    color: var(--md-sys-color-on-primary);
}

header.scrolled .material-symbols-outlined {
    font-size: 24px;
}

.logo-text {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-secondary) 70%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(var(--md-sys-color-primary-rgb), 0.2);
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

header.scrolled .logo-text {
    font-size: 1.6rem;
}

nav ul {
    display: flex;
    gap: 32px;
    list-style: none;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

header.scrolled nav ul {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    height: 0;
    width: 0;
    overflow: hidden;
}

nav a {
    position: relative;
    color: var(--md-sys-color-on-surface);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 0;
    transition: color var(--md-motion-duration-short) var(--md-motion-easing-standard);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    border-radius: 3px;
    transition: width var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

nav a:hover {
    color: var(--md-sys-color-primary);
}

nav a:hover::after {
    width: 100%;
}

.theme-toggle {
    position: relative;
    width: 60px;
    height: 32px;
    border-radius: var(--md-shape-corner-full);
    background: var(--md-sys-color-surface-variant);
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 4px;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

header.scrolled .theme-toggle {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
    width: 0;
    height: 0;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    transform: translateX(0);
    transition: transform var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.dark-theme .theme-toggle::before {
    transform: translateX(28px);
}

.theme-icon {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.theme-icon.sun-icon {
    color: var(--md-sys-color-on-primary);
}

.theme-icon.moon-icon {
    color: var(--md-sys-color-on-surface-variant);
}

.dark-theme .theme-icon.sun-icon {
    color: var(--md-sys-color-on-surface-variant);
}

.sun-icon {
    margin-right: auto;
}

.moon-icon {
    margin-left: auto;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--md-sys-color-on-surface);
    font-size: 1.8rem;
    cursor: pointer;
    z-index: 1001;
    transition: transform 0.3s ease;
}

.mobile-menu-btn:hover {
    transform: scale(1.1);
}

.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 320px;
    height: 100%;
    background: var(--md-sys-color-surface);
    z-index: 1000;
    padding: 100px 30px 30px;
    box-shadow: -5px 0 15px rgba(0,0,0,0.1);
    transition: right 0.4s ease-in-out;
    overflow-y: auto;
}

.mobile-menu.active {
    right: 0;
}

.mobile-menu ul {
    list-style: none;
    margin-bottom: 40px;
}

.mobile-menu li {
    margin-bottom: 20px;
}

.mobile-menu a {
    color: var(--md-sys-color-on-surface);
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: 500;
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--md-sys-color-outline);
    transition: color 0.3s ease;
}

.mobile-menu a:hover {
    color: var(--md-sys-color-primary);
}

.mobile-menu .theme-toggle-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 30px;
    gap: 15px;
}

.theme-toggle-label {
    color: var(--md-sys-color-on-surface);
    font-size: 1.1rem;
    font-weight: 500;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 160px 0 80px;
    overflow: hidden;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 650px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--md-sys-color-on-surface);
    letter-spacing: -1.5px;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.slogan {
    font-size: 1.8rem;
    color: var(--md-sys-color-on-surface-variant);
    margin-bottom: 40px;
    font-weight: 300;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.2s forwards;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-secondary) 100%);
    background-size: 200% auto;
    color: var(--md-sys-color-on-primary);
    padding: 18px 42px;
    border-radius: var(--md-shape-corner-extra-large);
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 10px 20px rgba(var(--md-sys-color-primary-rgb), 0.3),
                0 0 15px rgba(var(--md-sys-color-secondary-rgb), 0.2);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1), 
                background-position 0.5s ease;
    transform: translateY(0);
    border: none;
    cursor: pointer;
    animation: fadeInUp 1s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
}

.cta-button:hover {
    transform: translateY(-6px) scale(1.03);
    box-shadow: 0 15px 30px rgba(var(--md-sys-color-primary-rgb), 0.4),
                0 0 25px rgba(var(--md-sys-color-secondary-rgb), 0.3);
    background-position: right center;
}

.features {
    padding: 120px 0;
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 80px;
    position: relative;
    color: var(--md-sys-color-on-surface);
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1s var(--md-motion-easing-emphasized) forwards;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 6px;
    background: linear-gradient(90deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    border-radius: 3px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 32px;
    align-items: stretch;
}

.feature-card {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-shape-corner-large);
    overflow: hidden;
    box-shadow: var(--md-elevation-1);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    border: 1px solid var(--md-sys-color-outline);
    transform: translateY(60px);
    opacity: 0;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.feature-card.visible {
    transform: translateY(0);
    opacity: 1;
}

.feature-card.visible:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--md-elevation-4);
    z-index: 10;
}

.feature-header {
    padding: 24px;
    display: flex;
    align-items: flex-start;
    gap: 20px;
    cursor: pointer;
    transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
    min-height: 180px;
    flex: 1;
}

.feature-header:hover {
    background-color: var(--md-sys-color-surface-variant);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    border-radius: var(--md-shape-corner-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.8rem;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    color: var(--md-sys-color-on-primary);
    box-shadow: 0 4px 10px rgba(var(--md-sys-color-primary-rgb), 0.2);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    background: linear-gradient(135deg, var(--md-sys-color-secondary), var(--md-sys-color-primary));
    color: var(--md-sys-color-on-primary);
    box-shadow: 0 0 20px rgba(var(--md-sys-color-primary-rgb), 0.5);
}

.feature-text {
    flex: 1;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--md-sys-color-on-surface);
    margin-bottom: 12px;
}

.feature-desc {
    color: var(--md-sys-color-on-surface-variant);
    font-size: 1.05rem;
    line-height: 1.7;
}

.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.preview-modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-shape-corner-large);
    max-width: 90%;
    max-height: 90vh;
    width: 800px;
    overflow: hidden;
    box-shadow: var(--md-elevation-4);
    transform: translateY(30px) scale(0.95);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.preview-modal.active .modal-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.modal-header {
    padding: 12px 24px;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    color: var(--md-sys-color-on-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.3rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    color: var(--md-sys-color-on-primary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.close-modal:hover {
    background: rgba(255,255,255,0.2);
}

.modal-image {
    width: 100%;
    height: auto;
    display: block;
    padding: 8px;
    border-radius: var(--md-shape-corner-medium);
}

.download {
    padding: 120px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--md-sys-color-outline);
    isolation: isolate;
}

.download::before,
.download::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    z-index: -1;
    filter: blur(80px);
    animation: float 20s ease-in-out infinite;
}

.download::before {
    width: 80vmax;
    height: 80vmax;
    top: 20%;
    left: 20%;
    background: radial-gradient(
        circle, 
        rgba(124, 77, 255, 0.6),
        transparent 70%
    );
    animation-delay: 0s;
    animation-direction: alternate;
    opacity: 0.5;
}

.download::after {
    width: 90vmax;
    height: 90vmax;
    top: 60%;
    left: 60%;
    background: radial-gradient(
        circle, 
        rgba(0, 176, 255, 0.7),
        transparent 65%
    );
    animation-delay: 2s;
    animation-direction: alternate-reverse;
    opacity: 0.6;
}

.download-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    background: rgba(var(--md-sys-color-surface-rgb), 0.6);
    backdrop-filter: blur(20px);
    border-radius: var(--md-shape-corner-extra-large);
    padding: 40px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.download-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 32px;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1s var(--md-motion-easing-emphasized) forwards;
}

.download-desc {
    font-size: 1.4rem;
    margin-bottom: 50px;
    color: var(--md-sys-color-on-surface-variant);
    opacity: 0;
    transform: translateY(40px);
    animation: fadeInUp 1s var(--md-motion-easing-emphasized) forwards;
    animation-delay: 0.2s;
}

.android-requirements {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--md-shape-corner-large);
    padding: 20px;
    margin: 30px auto;
    max-width: 584px;
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.android-requirements:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.requirements-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 10px;
    margin-bottom: 10px;
}

.requirement-item {
    display: flex;
    align-items: center;
    padding: 12px 24px;
    gap: 12px;
}

.requirement-item i {
    color: var(--md-sys-color-on-surface);
    font-size: 1.6rem;
}

.requirement-item span {
    color: var(--md-sys-color-on-surface);
    font-weight: 500;
    font-size: 1.1rem;
}

.store-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.store-button {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 45px;
    border-radius: var(--md-shape-corner-large);
    font-size: 1.0rem;
    font-weight: 600;
    text-decoration: none;
    min-width: 280px;
    max-width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    box-shadow: var(--glass-shadow);
    border: 1px solid var(--glass-border);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
    position: relative;
    overflow: hidden;
    color: var(--md-sys-color-on-surface); /* Цвет текста и иконок по умолчанию */
}

.store-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(var(--md-sys-color-primary-rgb), 0.15), rgba(var(--md-sys-color-secondary-rgb), 0.1));
    z-index: -1;
    opacity: 0;
    transition: opacity var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.store-button:hover {
    transform: scale(1.03);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
}

.store-button:hover::before {
    opacity: 1;
}

.store-icon {
    font-size: 1.8rem;
    color: var(--md-sys-color-on-surface);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.store-name {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--md-sys-color-on-surface);
    letter-spacing: -0.5px;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-emphasized);
}

.store-button:hover .store-icon,
.store-button:hover .store-name {
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.particles {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    opacity: 0.1;
    animation: float 6s infinite ease-in-out;
}

footer {
    background: var(--md-sys-color-surface);
    padding: 40px 0;
    border-top: 1px solid var(--md-sys-color-outline);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    font-size: 0.9rem;
    color: var(--md-sys-color-on-surface-variant);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--md-sys-color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-on-surface);
    transition: all 0.3s var(--md-motion-easing-emphasized);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    color: var(--md-sys-color-on-primary);
    transform: translateY(-3px);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(15px, -15px); }
    50% { transform: translate(-10px, 10px); }
    75% { transform: translate(5px, -5px); }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    25% {
        transform: translate(10%, -15%);
    }
    50% {
        transform: translate(-10%, 10%);
    }
    75% {
        transform: translate(5%, -5%);
    }
}

@media (max-width: 768px) {
    .feature-expand {
        display: flex;
        justify-content: center;
        padding: 18px;
        background: var(--md-sys-color-surface-variant);
        color: var(--md-sys-color-on-surface);
        cursor: pointer;
        transition: all var(--md-motion-duration-short) var(--md-motion-easing-standard);
    }
    
    .feature-expand i {
        transition: transform 0.4s var(--md-motion-easing-emphasized);
    }
    
    .feature-image-container {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.8s cubic-bezier(0.165, 0.84, 0.44, 1);
        padding: 0 24px;
    }
    
    .feature-image {
        width: 100%;
        height: auto;
        display: block;
        border-radius: var(--md-shape-corner-medium);
        margin: 24px 0;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    
    .store-buttons {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    
    .store-button {
        min-width: 260px;
        padding: 16px 25px;
    }
    
    .requirements-list {
        flex-direction: column;
        align-items: center;
    }
}

@media (min-width: 769px) {
    .feature-image-container,
    .feature-expand {
        display: none;
    }
}

@media (max-width: 1024px) {
    .hero {
        padding-top: 180px;
    }
    
    .hero h1 {
        font-size: 3.5rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .download-title {
        font-size: 3rem;
    }
}

@media (max-width: 900px) {
    nav ul {
        gap: 20px;
    }
    
    .logo-text {
        font-size: 1.8rem;
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 140px;
    }
    
    .hero h1 {
        font-size: 2.8rem;
    }
    
    .slogan {
        font-size: 1.4rem;
    }
    
    nav ul {
        display: none;
    }
    
    .header-container .theme-toggle {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .download-title {
        font-size: 2.5rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .logo-text {
        font-size: 1.6rem;
    }
    
    header.scrolled .logo-text {
        font-size: 1.2rem;
    }
    
    .logo-icon {
        width: 40px;
        height: 40px;
    }
    
    header.scrolled .logo-icon {
        width: 36px;
        height: 36px;
    }
    
    .logo-wrapper {
        width: 100%;
        justify-content: space-between;
    }
    
    header.scrolled .mobile-menu-btn {
        opacity: 1;
        visibility: visible;
        transform: none;
        width: auto;
        height: auto;
    }
    
    .mobile-menu .theme-toggle {
        display: flex;
        opacity: 1;
        visibility: visible;
        transform: none;
        width: 60px;
        height: 32px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2.3rem;
    }
    
    .slogan {
        font-size: 1.2rem;
    }
    
    .cta-button {
        padding: 16px 32px;
        font-size: 1.1rem;
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .download-title {
        font-size: 2.2rem;
    }
    
    .mobile-menu {
        max-width: 280px;
    }
    
    .store-button {
        min-width: 240px;
        padding: 15px 20px;
    }
    
    .store-name {
        font-size: 1.3rem;
    }
    
    .requirement-item {
        padding: 10px 20px;
    }
}

.code-highlight {
    font-family: 'Roboto Mono', monospace;
    border-radius: var(--md-shape-corner-extra-small);
    padding: 0.1em 0.4em;
    font-size: 0.95em;
    display: inline-block;
    line-height: 1.4;
}

.code-highlight {
    background: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface-variant);
    border: 1px solid var(--md-sys-color-outline);
}

.dark-theme .code-highlight {
    background: rgba(255, 255, 255, 0.08);
    color: var(--md-sys-color-on-surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.triple-quotes {
    font-weight: 600;
    letter-spacing: -0.5px;
}

.single-quotes {
    font-style: italic;
}
/* Google Play Modal - Updated Styles */
.google-play-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.8);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 20px;
    box-sizing: border-box;
}

.google-play-modal.active {
    display: flex;
    opacity: 1;
}

.google-play-content {
    background: var(--md-sys-color-surface);
    border-radius: var(--md-shape-corner-extra-large);
    max-width: 100%;
    width: 600px;
    overflow: hidden;
    box-shadow: var(--md-elevation-4);
    display: flex;
    flex-direction: column;
    max-height: 90vh;
    transform: translateY(30px) scale(0.95);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.google-play-modal.active .google-play-content {
    transform: translateY(0) scale(1);
    opacity: 1;
}

.google-play-header {
    padding: 20px 25px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--md-sys-color-outline);
    flex-shrink: 0;
}

.google-play-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--md-sys-color-on-surface);
    margin: 0;
}

.google-play-close {
    background: none;
    border: none;
    color: var(--md-sys-color-on-surface);
    font-size: 1.5rem;
    cursor: pointer;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.google-play-close:hover {
    background: var(--md-sys-color-surface-variant);
}

.google-play-body {
    padding: 20px 25px;
    color: var(--md-sys-color-on-surface);
    line-height: 1.7;
    overflow-y: auto;
    flex: 1;
}

.steps-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.google-play-step {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.step-number {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--md-sys-color-on-primary);
    font-weight: 600;
    flex-shrink: 0;
    font-size: 1rem;
}

.step-content {
    flex: 1;
}

.step-title {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1.15rem;
    color: var(--md-sys-color-on-surface);
}

.google-play-footer {
    display: flex;
    gap: 15px;
    justify-content: center;
    padding: 20px;
    border-top: 1px solid var(--md-sys-color-outline);
    flex-shrink: 0;
    flex-wrap: wrap;
}

.google-play-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--md-sys-color-primary) 0%, var(--md-sys-color-secondary) 100%);
    color: var(--md-sys-color-on-primary);
    padding: 12px 24px;
    border-radius: var(--md-shape-corner-extra-large);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(var(--md-sys-color-primary-rgb), 0.3);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border: none;
    cursor: pointer;
    min-width: 180px;
    justify-content: center;
}

.google-play-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(var(--md-sys-color-primary-rgb), 0.4);
}

.google-play-button.secondary {
    background: var(--md-sys-color-surface-variant);
    color: var(--md-sys-color-on-surface);
}

.google-play-button.secondary:hover {
    background: var(--md-sys-color-surface);
    transform: translateY(-4px);
}

/* Mobile optimizations */
@media (max-width: 600px) {
    .google-play-content {
        max-height: 85vh;
        width: 100%;
    }
    
    .google-play-header {
        padding: 15px 20px 10px;
    }
    
    .google-play-title {
        font-size: 1.4rem;
    }
    
    .google-play-body {
        padding: 15px 20px;
        font-size: 0.95rem;
    }
    
    .steps-container {
        gap: 15px;
        margin-top: 15px;
    }
    
    .step-title {
        font-size: 1.1rem;
    }
    
    .google-play-footer {
        padding: 15px;
        flex-direction: column;
        align-items: stretch;
    }
    
    .google-play-button {
        width: 100%;
        padding: 14px;
    }
}

@media (max-width: 400px) {
    .google-play-step {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .step-content {
        padding-left: 0;
    }
}